Improvement in saw-filing machines



UNITED STATES cEARLEs E. EENis, 0E BALTIMORE, MARYLAND.

IMPROVEMENT IN SAW-FILING MACHINES.

Specilication forming part of Letters Patent No. 139,149, dated May 20, 1873; application filed October 21, 1672.

To all whom it may concern:

Be it known that I, CHARLES F. HENIS, of the city and county of Baltimore and State ot' Maryland, have invented a new and Improved Saw-Filing Machine; and I do hereby declare the following to be a full and exact description ofthe same, reference being had to the accompanying drawing forming part ot' this specilication, in which- Figure 1 is a front view of my apparatus. Fig. 2 is a top view ot' the same, and Fig. 3 is a side elevation with the file-holder in section.

Similar letters of reference in the accompanyin g drawing denote the same parts.

This invention belongs to the class of hand- `machines for tiling straight saws; and has for its object to improve the construction of such a machine in the following respects: First, ot' the tile-h olding part of the apparatus; second, of that part of the apparatus by which the width of the teeth is regulated; third, ot' that part of the apparatus by which the bevel of the edge ofthe toth is regulated; and, fourth, of that part ofthe apparatus by which the saw is clamped during the filing process. To this end the invention consists, lirst, in a sliding file-holder, constructed substantially as hereinafter described; second, in the combination of the file-holder with an adjustable cam for arresting the swinging motion of the le-holder; third, in the combination ofthe file-holder with a swinging plate and an adjustable stop for regulating the play of the plate; fourth, in the combination of the tile-holder with a vertically-sliding plate, stop, and spring; lifth, in the combination of the clamping apparatus with the file-holder, all which I will now proceed to set forth.

In the drawing, A is the tile, the same having its ends in sockets a, which are placed in eyes at the outer extremities of the end pieces B B of the le-holder. The sockets a can be rotated in these eyes so as to allow of turning the file to make it conform to the slant of the teeth. The end pieces B B are further connected, by rods b, parallel to each other and to the file, and secured by set-screws so as to be removable, and so, also, that the end piece furthest from the handle C can be slipped along the rods, so as to accommodate the holder to les of varying lengths. The upper rod b slides in vertical lugs d extending from the face of a plate, l). From the. back or' this plate extend horizontal lugs cf, which slide on a vertical post, F, forming the front ot the frame to which the tile-holder is'attached. Epis a cam pivoted to the face ofthe plate l) opposite the middle rod I), which cam can be turned so as to interpose a greaterorless thickness between the barb and plate D. On the upper barb, as` a pivot, the lile can be swung outward from the post F. In the lower lug f is a set-screw, q, which regulates the vertical play ot' the plate l). Beneath the lugf, and encircling the post F, is a spring, h, which tends to throw the plate 1)' upward. held between the plates t' j, as hereinafter described, the iile is carried down between its teeth by depressing the plate D. The cam E can be turned so as to adapt the iile to saws having teeth of dili'erent widths; and, it' kept in the same position throughout the tiling ofV any one saw, said cam gives all the` teethof that saw the same width. 'Ihe bevel ot' the teeth-that is, the lateral angle of their facesis attained by swinging the plate D on the post F, and this bevel is regulated by means ofa stop, lr, projecting downward from an adjustable plate, L, which is secured by a set-screw passing through a slot in said plate to the top ot' a plate, G, having a slot through which the I stop It' passes. The upper lug e ot' the plate D has a central notch, one side or the other of which, as the plate swings, strikes the stop la, the distance to which the plate swings being regulated by the position of the stop l0. 'Ihe post F is' secured at its lower end to the plate j, and its upper end to the plate Gr. The plates G and j are further connected by a post, H, t

which also forms one of the levers ofthe clamping apparatus, the other lever H being the movable one, and pivoted to H, and bearn g the jaw i at its lower end. Between the longer arms of the levers H H is a spring, which tends to throw the movable lever away from the fixed one, and thus keep the jaws 'ij open. A tlange,

l', on the plate Gr stops the movable lever at` the proper point. The lixedjawj has a iiange, m, on its upper edge to keep the saw at its proper place between the jaws. Handles I l' extend backward trom the tops otl the levers H H. By grasping these handles with one ATENT FFICE' supposing the saw to be` hand the operator clamps the jaws z' j against the saw, the other hand being left free tooperate the file. On relieving the handles from pressure the jaws are thrown open by the force ofthe spring, so that the shifting of the instrument from point to point of the saw is a very easy matter.

What I claim as new isl. Thele-holder, consisting ofthe end pieces B B', sockets a a, rods b b, on which the end piece B slides, and set-screws c c o', all arranged, constructed, and operated as set forth.

2. The combination of -the file-holder `with the plate D and adjustable cam E, as described.

3. The combination of the frame H F, plate D, le-holder, and stop la, as set forth.

Witnesses:

^ MELVILLE CHURCH,

N. K. ELLsWoRTI-L 

